Pressure-regulating valve.



J.P.DELANEY. vPRESSURE REGULATING VALVE. I APPLICATION FILED DEO. 6, 1911.

UNITED STATES PATENT oEEroE.

JOSEPH P. DELANEY, 0F' PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 'MUNICIPAL SUPPLIES COMPANY, 0F lIT'ISBURGI-I,EENNSYLVANIA.

BEEssURE-REGULATING VALVE.

Specification of Letters Patent.

Application led December 6, 1911. Serial No. 664,248.

- egheny and State of Pennsylvania, a citizenaof the United States, have invented or discovered certain new and useful Improve ments in Pressure-Regulating Valves, of which improvements the following is a specification.

My invention has to do with regulators controlling the degree of opening of' valves, which inV t'urn control the fiow of gas from high to'low-pressure pipes; and my invention hasA particularly to do with valves wherein the degree of opening is maintained in an inverse ratio to the pressure in the low-pressure pipes.

The object of my invention is to provide a valve-regulator which will be effective to operate as described, but which will prevent 'the valve from flying wide open when the pressure in the lowpressure pipe falls below a predetermined amount; l

My invention is illustrated in the accompanying drawing, which forms part o f my specificatiom and which shows a longitudinalisectional view of a gas-valve regulator connected t0 high and low-pressure pipes.

In the construction shown herein, a highpressure pipe 1 and a low-pressure pipe 2 are connected to opposite sides of a valve casing 3; and, to the top of the valve casing 3, a regulator 4 is'secured. Any preferred form of valve may be used, that illustrated herein being a balanced double-seat valve,

the plug 5 opening with, andthe plug 6 against, ythe direction-of flow of the gas. The regulator 4 preferably consists of a gastight gas-chamber 7 having a membertsuch as the diaphragm 8) movable therein by t-he pressure of gas, such movement being opposed by a suitable resistance, such as the weighted arm 9. The arm 9 may be pivoted, as at10, and one end -thereof may suitably engage the rod 11, which rod may be connectedvat its opposite ends to the diaphragm 8 and the plugs .5, 6, and may be mounted in the stem 1Q.l

' As usually constructed, the chamber 7 of such regulators has direct pipe connection to the low-pressure pipe 2,.as by the pipes 13, 14 and dotted line pipe 15. In the operation of such a valve, gas flows from the pipe 1 through the double seated valve 5, 6 and into the low-pressure pipe 2, the sald valve being held open by means of the weightedarm 9. Furthermore, gas from the low-pressure pipe flows through the `and presses against` the diaphragm 8. The area of the diaphragm 8 exposed to the lo w pressure gas, and the effectiveness of the weighted arm 9 are so correlatedthat the versely proportional to the pressure in ythe rises to or above a certain predetermined amount, the valve will be entirely closed, remaining closed until the pressure falls below the said predeterminedamount.

My invention consists specifically in adding to such a construction an auxiliary convalve 5, 6 from flying wide open when the pressure in the pipe Q is materially decreased, asvwould happen in case aleak occurred therein. Preferably such mechanismtconsists of a second or auXiliary gas chamber 16 connected bythe pipes 14, 13 to the low-pressure pipe, and having com munication by'means of the portv 17 with the chamber 7. Also a suitable valve 18 is employed to control the flow of gas through the said port. Any desired pressure-controlled means, such as a well known Vweighted diaphragm 19 may be employed to control the operation of the said valve, the arrangement being such that the said valve will be normally held open by means of the pressure of the low-pressure pipe acting beneath the'diaphragm to lift. the weight, but, when such pressure falls below a certain predetermined amount, the weight'will fall rod 2O and arm 21 to the weight) will close. By the closing of the said valve, a quantity of gas will be confined in the chamber 7, and the said confined 'gas will be effective to prevent the diaphragm 8 from` rising higher, with the consequent wider opening it will be seen 'that a safeguard is provided against a leak inthe low pressure main, to

open and feed, gas tothe leak.

I claim herein as my invention: l 1. In a gas-valve regulator, the combination with high and low-pressure pipes, a `valve controlling communication between the said pipe, and a gas-.tight chamber pro- Patented June 4, 1912.

pipes 13, 14 and 15- into the gas chamber 7'-,v

degree of opening of the saidvalve is in-l said chamber; and, when the said pressure trolling mechanism, effective to prevent the( and the valve 18 (being connected by the j ofthevalve 5,'v 6. By such a construction,-

the extent that the valve will not fiy wide vided with a movable Vmember having operative connection to ysaid valve, of an auxiliary gas-chamber having communication with said gas-tight chamber and said lowpressure pipe, avalve controlling the comgas falls to or below a kpredetermined amount.

2. In a gas-:valve regulator, vthe combination .with high and low pressure pipes, a valve controlling communication between said pipes, a gas-tight chamber, a movable diaphragm in said chamber, a rod connecting said valve and said diaphragm, and a weighted arm operatively connected to said rod, of an auxiliary gas-chamberhaving communication with said low-pressure pipe and said gas-tight chamber, a valve in said auxiliary chamber controlling 'the comv munication between the saidgas-chambers, a Weighted diaphragm in said auxiliary chamber and operative connection between vsaid last named valve and said weighted `pressure pipes, a gas-tight chamber independent of and closed off from the valve chamber and provided with-amovable member having operative connection with the valve, and anf auxiliary gas chamber com' municating with saidygas-tight chamber yand `also arranged to be connected to the lowpressure pipe, a valve controlling the communication between the gas chambers, and connections controlled by the gas from the low-pressure pipe for maintaining the vlast namedvalve in open position when the lowpressure gas exceeds a certain amount.

In testimony whereof I have hereunto set my hand.

JOSEPH P. DELANEY. VVi'tnesses:

PAUL N; CRITCHLOW, FRANCIS J. ToMAssoN. 

